gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2017-8-3-0258gtcrust-399Research ArticleПАЛЕОГЕОДИНАМИКАPALEOGEODYNAMICSLATE CENOZOIC VOLCANISM OF THE UDA RIVER AREA (EASTERN SAYAN, SIBERIA): THE FIRST GEOCHEMICAL AND ISOTOPIC DATALATE CENOZOIC VOLCANISM OF THE UDA RIVER AREA (EASTERN SAYAN, SIBERIA): THE FIRST GEOCHEMICAL AND ISOTOPIC DATADemonterovaE. I.DemonterovaE. I.

Irkutsk

Irkutsk

IvanovA. V.IvanovA. V.

Irkutsk

Irkutsk

PerepelovA. B.PerepelovA. B.

Irkutsk

Irkutsk

Institute of the Earth’s Crust, Siberian Branch of RASРоссияInstitute of the Earth’s Crust, Siberian Branch of RASRussian FederationA.P. Vinogradov Institute of Geochemistry, Siberian Branch of RASРоссияA.P. Vinogradov Institute of Geochemistry, Siberian Branch of RASRussian Federation20171110201783445448Copyright © Demonterova E.I., Ivanov A.V., Perepelov A.B., 20172017Demonterova E.I., Ivanov A.V., Perepelov A.B.Demonterova E.I., Ivanov A.V., Perepelov A.B.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.gt-crust.ru/jour/article/view/399

Volcanic eruptions within the Baikal rift of predominantly basaltic composition belong to numerous small-volume eruptions, which took place in Cenozoic in Central Asia. The great majority of these eruptions occurred within the mobile belts in the southern framing of the Siberian craton. Only few of such eruptions have happened within the cratonic margin and these are of particular interest, because volcanic rock composition may provide insights on the composition of the cratonic lithosphere. Until recently, the Uda river area with the size of ~2000 km2 located within the Biryusa block of the Siberian craton (Fig. 1) was a white spot in terms of precise geochemical and isotopic data for basalts. Here we provide such data for the first time.

Volcanic eruptions within the Baikal rift of predominantly basaltic composition belong to numerous small-volume eruptions, which took place in Cenozoic in Central Asia. The great majority of these eruptions occurred within the mobile belts in the southern framing of the Siberian craton. Only few of such eruptions have happened within the cratonic margin and these are of particular interest, because volcanic rock composition may provide insights on the composition of the cratonic lithosphere. Until recently, the Uda river area with the size of ~2000 km2 located within the Biryusa block of the Siberian craton (Fig. 1) was a white spot in terms of precise geochemical and isotopic data for basalts. Here we provide such data for the first time.

ReferencesHarris N.R., 1998. Isotopic, Geochemical, and Geochronological Constraints on the Origin and Evolution of Cenozoic Volcanism, Baikal Rift Zone, Siberia. Ph.D. thesis, Massachusetts Institute of Technology, Cambridge, 438 p.Harris N.R., 1998. Isotopic, Geochemical, and Geochronological Constraints on the Origin and Evolution of Cenozoic Volcanism, Baikal Rift Zone, Siberia. Ph.D. thesis, Massachusetts Institute of Technology, Cambridge, 438 p.Ivanov A.V., 2012. Interaction of mantle-derived melts with crust on its upwelling to the surface: reason and consequence. Geodynamics & Tectonophysics 3 (1), 19–26 (in Russian). https://doi.org/10.5800/GT-2012-3-1-0059.Ivanov A.V., 2012. Interaction of mantle-derived melts with crust on its upwelling to the surface: reason and consequence. Geodynamics & Tectonophysics 3 (1), 19–26 (in Russian). https://doi.org/10.5800/GT-2012-3-1-0059.Ivanov A.V., Demonterova E.I., Perepelov A.B., Lebedev V.A., He H., 2015. Volcanism in the Baikal rift: 40 years of activeversus-passive model discussion. Earth-Science Reviews 148, 18–43. https://doi.org/10.1016/j.earscirev.2015.05. 011.Ivanov A.V., Demonterova E.I., Perepelov A.B., Lebedev V.A., He H., 2015. Volcanism in the Baikal rift: 40 years of activeversus-passive model discussion. Earth-Science Reviews 148, 18–43. https://doi.org/10.1016/j.earscirev.2015.05. 011.Perepelov A.B., Kuzmin M.I., Tsypukova S.S., Demonterova E.I., Ivanov A.V., Scherbakov Y.D., Puzankov M.Yu., Odgerel D., Bat-Ulzii D., 2017. Eclogitic fingerprints in evolution of the Late Cenozoic alkaline basaltic volcanism at the southwestern Baikal rift zone – geochemical signs and geodynamic consequences. Doklady Earth Science (in press).Perepelov A.B., Kuzmin M.I., Tsypukova S.S., Demonterova E.I., Ivanov A.V., Scherbakov Y.D., Puzankov M.Yu., Odgerel D., Bat-Ulzii D., 2017. Eclogitic fingerprints in evolution of the Late Cenozoic alkaline basaltic volcanism at the southwestern Baikal rift zone – geochemical signs and geodynamic consequences. Doklady Earth Science (in press).Rasskazov S.V., Bowring S.A., Housh T., Demonterova E.I., Logatchev N.A., Ivanov A.V., Saranina E.V., Maslovskaya M.N., 2002. The Pb, Nd, and Sr isotope systematics in heterogeneous continental lithosphere above a convecting mantle domain. Doklady Earth Sciences 387 (9), 1056–1059.Rasskazov S.V., Bowring S.A., Housh T., Demonterova E.I., Logatchev N.A., Ivanov A.V., Saranina E.V., Maslovskaya M.N., 2002. The Pb, Nd, and Sr isotope systematics in heterogeneous continental lithosphere above a convecting mantle domain. Doklady Earth Sciences 387 (9), 1056–1059.Savatenkov V.M., Yarmolyuk V.V., Kudryashova E.A., Kozlovskii A.M., 2010. Sources and geodynamics of the Late Cenozoic volcanism of Central Mongolia: evidence from isotope-geochemical studies. Petrology 18 (3), 278–307. https://doi.org/10.1134/S0869591110030057.Savatenkov V.M., Yarmolyuk V.V., Kudryashova E.A., Kozlovskii A.M., 2010. Sources and geodynamics of the Late Cenozoic volcanism of Central Mongolia: evidence from isotope-geochemical studies. Petrology 18 (3), 278–307. https://doi.org/10.1134/S0869591110030057.Tsypukova S.S., Perepelov A.B., Demonterova E.I., Pavlova L.A., Travin A.V., Puzankov M.Yu., 2014. Origin and evolution of Neogene alkali-basaltic magmas in the southwestern flank of the Baikal rift system (Heven lava plateau, northern Mongolia). Russian Geology and Geophysics 55 (2), 190–215. https://doi.org/10.1016/j.rgg.2014.01.006.Tsypukova S.S., Perepelov A.B., Demonterova E.I., Pavlova L.A., Travin A.V., Puzankov M.Yu., 2014. Origin and evolution of Neogene alkali-basaltic magmas in the southwestern flank of the Baikal rift system (Heven lava plateau, northern Mongolia). Russian Geology and Geophysics 55 (2), 190–215. https://doi.org/10.1016/j.rgg.2014.01.006.Yarmolyuk V.V., Ivanov V.G., Kovalenko V.I., Pokrovskii B.G., 2003. Magmatism and geodynamics of the Southern Baikal volcanic region (mantle hot spot): results of geochronological, geochemical, and isotopic (Sr, Nd, and O) investigations. Petrology 11 (1), 1–30.Yarmolyuk V.V., Ivanov V.G., Kovalenko V.I., Pokrovskii B.G., 2003. Magmatism and geodynamics of the Southern Baikal volcanic region (mantle hot spot): results of geochronological, geochemical, and isotopic (Sr, Nd, and O) investigations. Petrology 11 (1), 1–30.Yarmolyuk V.V., Kudryashova E.A., Kozlovsky A.M., Lebedev V.A., Savatenkov V.M., 2015. Late Mesozoic – Cenozoic intraplate magmatism in Central Asia and its relation with mantle diapirism: Evidence from the South Khangai volcanic region, Mongolia. Journal of Asian Earth Sciences 111, 604–623. https://doi.org/10.1016/j.jseaes.2015.05.008.Yarmolyuk V.V., Kudryashova E.A., Kozlovsky A.M., Lebedev V.A., Savatenkov V.M., 2015. Late Mesozoic – Cenozoic intraplate magmatism in Central Asia and its relation with mantle diapirism: Evidence from the South Khangai volcanic region, Mongolia. Journal of Asian Earth Sciences 111, 604–623. https://doi.org/10.1016/j.jseaes.2015.05.008.

The authors declare that there are no conflicts of interest present.